Apparatus for polishing and grinding glass.



N0. 891,198. PATENTED JUNE 16, 1908.

I F. L. 0. WAD WGRTII.

APPARATUS FOR POLISHING AND GRINDING GLAss.

PPLICATION FILED APR. 17, 1 9Q5 INY EN j'Q JJ UNI ED STATES PATENTOFFICE.

FRANK L. 'O. WADSWORIH, OF MORGANTOWN, WEST VIRGINIA, ASSIGNOR TOPRESSED PRISM PLATE GLASS COMPANY, 01 NEW YORK, N. Y.,

A CORPORATION OF WEST VIRGINIA.

I APPARATUS FOR POLISHING AND GRINDING GLASS.

Specification of Letters Patent.

Patented June 16, 1908 Application filed April 17, 1905. .Serial No.255,863.

To all whomtt may concern:

Be-it known that I,

WORTH, of Morgantown, Monongalia county,

-sect1on; and

designed to increase tion andat thesame time improve the action Y of thegrlnding or polishing surfaces upon the West Virginia, have invented anew and useful Apparatus for Grinding and Polishing 'Glass, of which thefollowing is a full, clear,

application.

. My invention relates to the' class of grinding 1 machines for plateglass, and is and'polishi mg the speed of the operaglass. Y

It consists in a novel construction of the polishing blocks or shoes.

-'a disk-bearing which gives the disk a free' socket joint.

{fishing disk 5' as connected to its stem 6 by ball'j'and socket joint7. by the undercut flange also: rovided for the disk which surrounds Ihaveimproved the polishing disks by the use of a ball and socket jointbetween the polshlng disk and its stem in combination with rotation andindependent of the ball and Thus in Fig. 2 I show the pol- A be'aring8formed 8 of its hub or boss is the ball ,joint and supports the disk sothat the diskrotates on this bearing while the ball joint allowsuniversal adjustment. The advantage'oflthis feature lies in giving freerota tion while the table is rotating. Where the ball and socket jointalone is used the disk is liable to bind un'derthe pushing action of thetable-{but by combining the ball and socket joint with anindependentbearingl obtain free rotation of the disk, while at the sameFRANK L. O. WApa' a partial top plan showing thetime the disk can adjustitself to the table. The two half boxes 7 for the disk bearing areclamped together by the bolts 7 edge to edge, their lower ends looselyengaging the hub of the disk.

The felt or cloth 9 is secured to the polish ing disk 5 in the followingmanner: In; stead of using a plain edge on the disk around which thefelt is secured, I cut notches 10 in the edge of the disk as shown,these notches being shaped to receive the corner portions 9 of the felt,and being preferably of slightly less depth than the thickness of thefelt so that as theconfining ring 11 is forced up over the. disk it willbear only against the corner portions of the felt and force them intothe notches. This affords a positive seating of the felt, which-preventsits turning around the disk and it also economizes space'and gives alarger effective polishing area than heretofore. 7

Many changes may be made in the form and arrangement of the variousparts wlthout departing from my invention.

I claim:

1. In a machine for grinding and polishing glass, a stem or carrier, anda free non-driven grinding disk or wheel connected thereto by twoconcentric joints, one of which affords a rotating connection with thestern and the other a rocking or tilting connection therewith;substantially as described.

2. A polishing disk having notched edges arranged'to receive integralupturned corner I portions of the felt; substantially as described.

3. A polishing disk having notched edges f and felt secured thereto by aring, integral upturned corner portions of the elt fitting Within thenotches; substantially as described.

In testimony whereof, I have hereunto set my hand.

FRANK L. O. WADSWORTII. Witnesses:

R. D. LITTLE,

H. M. OoRWIN.

